Question

How to check whether a number is perfect or not in Python

Answer 1

# If the sum of all factors of a number is equal to the number, then the number is perfect

def is_perfect_number(num):
    # 28
    # factors = 1 + 2 + 4 + 7 + 14
    # 1 + 2 + 4 + 7 + 14 = 28

    sum_of_factors = 0

    for i in range(1, num):
        if num % i == 0:
            sum_of_factors += i

    return sum_of_factors == num

num = 28
if is_perfect_number(num):
    print("Perfect Number")
else:
    print("Not a Perfect Number")



'''
run:
 
Perfect Number
 
'''

 

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